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A new caliber ???


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Just found an interesting cartridge in with some stuff I bought.

It's marked R-P  444 Marlin

A 444 Marlin takes a .429 bullet and the case length is 2.225

The case I found has a .401 bullet and the case is 2.576, 3/8 of an inch longer.

Does anyone know, is this an actual caliber, or did someone just get bored and wanted to see what would happen if you ran a 444 Marlin case into a 41 Mag die.

 

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The .405 JES was/is a wildcat based on the .444 case, but used a .411 bullet. I remember reading about an Australian a decade back who was experimenting with necking the .444 down to .40 and calling it the .40-.444, of course. 

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There are a whole range of 444 based wildcats from JD Jones, 375, 358, 338, and 309.  Had no heard of a 40 cal version.   The JDJ wildcats all used the Marlin case to get similar performance to 308 based rounds, but in a rimmed case and low enough pressure to be safe in a contender. 

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1 hour ago, Michigan Slim said:

A picture would be great.

Here's the case in question.  444 Marlin on left

IM000001.JPG

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1 hour ago, Boggus Deal #64218 said:

That’s a lot of case stretching! Does it look like the case was spun to stretch it or was it soldered on.

Not soldered.  Just stretched

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